CN203434932U - Combiner box - Google Patents
Combiner box Download PDFInfo
- Publication number
- CN203434932U CN203434932U CN201320533067.2U CN201320533067U CN203434932U CN 203434932 U CN203434932 U CN 203434932U CN 201320533067 U CN201320533067 U CN 201320533067U CN 203434932 U CN203434932 U CN 203434932U
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- CN
- China
- Prior art keywords
- header box
- converter
- control unit
- accommodation space
- housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
A combiner box (500) is used for a solar photovoltaic power generation system, and comprises a shell (601), at least one set of DC/DC converters (540) and an MTTP control unit (3) used for controlling the DC/DC converters to work. Each DC/DC converter (540) comprises the semiconductor heating devices (101) and the electric reactors (104), and an enclosed accommodating space is formed inside the shell (601); the semiconductor heating devices (101) are fixedly arranged at the upper half part of the accommodating space, the MTTP control unit (3) is fixedly arranged at the lower half part of the accommodating space, and the radiators (102) are arranged at the upper half part of an outer wall of the shell (601). The combiner box provided by the utility model realizes a boost function by adding the DC/DC converters, and enables an output current at the back end of the combiner box in the photovoltaic power generation system to be reduced, thereby reducing the line loss. The combiner box is compact in structure layout and obvious in heat radiation effect.
Description
Technical field
The utility model relates to new energy field, relates in particular to a kind of header box.
Background technology
Solar energy, as a kind of emerging clean energy resource, is more and more subject to national attention, and photovoltaic transformer station is also more and more thereupon.Existing grid-connected photovoltaic system generally includes combining inverter, DC power distribution cabinet, header box, photovoltaic array, box type transformer, data communication cabinet and inversion room.
For photovoltaic generating system, in order to reduce the connecting line between photovoltaic module and inverter, maintain easily, need between photovoltaic module and inverter, increase photovoltaic array direct current collector-shoe gear, i.e. header box.This device is exactly the Cheng Yi road direct current output of confluxing of the array of some.
Existing header box, generally only confluxes, the basic function such as lightning protection, the electrical principle block diagram that Fig. 1 is a kind of existing header box.With reference to Fig. 1, header box 100 comprises monitor board 200, lightning protection device 300, DC circuit breaker QF1 and power transmission line 400.Wherein, power transmission line 400 comprises that the first wire 401 and the second wire 402, the first wires 401 have the first wire input end and the first wire output end, and the second wire 402 has the second wire input end and the second wire output end.Solar battery array comprises many string PV(photovoltaics) battery component, in the present embodiment, solar battery array comprises 16 string PV battery components; Header box 100 also comprises that quantity is the fuse FU of 2 times of PV battery components; The negative pole of the positive pole of all PV battery components and all PV battery components is corresponding one by one respectively with all fuse FU; The positive pole of all PV battery components is electrically connected by corresponding fuse FU and the first wire input end respectively; The negative pole of all PV battery components is electrically connected by corresponding fuse FU and the second wire input end respectively; Monitor board 200 is chip, have a plurality of branch voltages sampling pins, for be electrically connected external power source to monitor board 200 power supplies power pins and RS485 communication pin.The positive pole of each PV battery component all have with its one to one, and be electrically connected at and fuse FU that this PV battery component is corresponding and the sampling of the branch voltage between the first wire input end pin.Lightning protection device 300 is three utmost point discharge tubes, and its first discharge tube and the first wire input end are electrically connected, and its second discharge tube and the second wire input end are electrically connected, the 3rd discharge tube ground connection.Power transmission line 400 is also electrically connected through DC circuit breaker QF1 and externally fed circuit, and this DC circuit breaker QF1, for by between the first wire input end and the first wire output end, disconnects between the second wire input end and the second wire output end or while closure simultaneously.When DC circuit breaker QF1 is closed, after confluxing, exports at the first wire output end and the second wire output end the output voltage of all PV battery components of solar battery array.
But for photovoltaic generating system, because being subject to shade, geographical environment and installation factor etc., each PV battery component affects, while causing applying, the output voltage inconsistency of every string is larger, adopts header box as shown in Figure 1, will cause the generating efficiency of electricity generation system to reduce.
Utility model content
The purpose of this utility model is inconsistent for the output voltage of every string battery component of existing photovoltaic generating system, and a kind of header box is provided.
The technical scheme in the invention for solving the technical problem is:
The utility model provides a kind of header box, and for solar photovoltaic generation system, described header box comprises housing, at least one group of DC/DC converter and for controlling the MTTP control unit of described DC/DC converter work; Described DC/DC converter comprises semiconductor heating device and reactor;
This enclosure interior is formed with airtight accommodation space; This accommodation space the first half is provided with described semiconductor heating device regularly, and this accommodation space the latter half is installed with described MTTP control unit;
Described housing outer wall the first half is provided with radiator, and described radiator runs through described housing and is connected with described semiconductor heating device; Described reactor is arranged in described housing outer wall the latter half.
In the above-mentioned header box of the utility model, described semiconductor heating device comprises IGBT pipe or metal-oxide-semiconductor.
In the above-mentioned header box of the utility model, described MTTP control unit comprises dsp chip.
In the above-mentioned header box of the utility model, described DC/DC converter 540 is 4 groups or 8 groups.
In the above-mentioned header box of the utility model, described header box also comprises fuse, and this fuse is arranged in described accommodation space the latter half, and is arranged on described MTTP control unit below.
In the above-mentioned header box of the utility model, described header box also comprises isolating switch, and this isolating switch is arranged on described accommodation space the latter half, and is arranged on described MTTP control unit sidepiece.
In the above-mentioned header box of the utility model, described isolating switch comprises circuit breaker.
In the above-mentioned header box of the utility model, described header box also comprises EMC module, and described EMC module is arranged on described accommodation space the latter half, and is arranged between described MTTP control unit and described fuse.
In the above-mentioned header box of the utility model, described header box also comprises public busbar, and described public busbar is arranged in described accommodation space the first half, and is arranged on described semiconductor heating device top.
In the above-mentioned header box of the utility model, on the outer wall of described housing, at described reactor close position, be provided with the assembly that keeps off the rain for keeping off the rain to described reactor.
The header box that the utility model provides, by increasing DC/DC converter, realizing boost function, has reduced header box rear end output current in photovoltaic generating system, thereby has reduced line loss, and the topology layout of header box is compact, radiating effect is remarkable.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is a kind of electrical principle block diagram of existing header box;
Fig. 2 is the electrical principle block diagram of the header box of the utility model embodiment;
Fig. 3 is the structural representation of the header box of the utility model the first embodiment;
Fig. 4 is the structural representation along other direction of the header box shown in Fig. 3;
Fig. 5 is the structural representation of the header box of the utility model the second embodiment;
Fig. 6 is the structural representation along other direction of the header box shown in Fig. 5.
Embodiment
Below in conjunction with specific embodiment and accompanying drawing, the utility model is described in more detail.
With reference to Fig. 2, header box 500 is for solar photovoltaic generation system, comprise MPPT(Maximum Power Point Tracking, MPPT maximum power point tracking) control unit 3, at least one group of DC/DC converter 540, power transmission line 520, lightning protection device 530 and circuit breaker 109.Wherein, MPPT control unit 3 comprises dsp chip, has a plurality of branch current sampling pins, RS485 communication pin, PWM driving pin, lightning protection state feedback pin.Solar photovoltaic generation system comprises solar battery array; This solar battery array comprises many string PV battery components; The output voltage of all PV battery components of this solar battery array, after DC/DC converter boost confluxes, then is electrically connected with externally fed circuit after circuit breaker 109.
Particularly, the positive pole of all PV battery components of this solar battery array all has and its pin of branch current sampling one to one; Header box 500 also comprises a plurality of fuses 110; The positive pole of all PV battery components of this solar battery array and negative pole all have and its fuse 110 one to one; The positive pole of all PV battery components of this solar battery array is electrically connected with corresponding branch current sampling pin through corresponding fuse 110 respectively;
DC/DC converter 540 has the first converter input A and the second converter input B, and first converter output terminal E and the second converter output terminal F, comprise IGBT pipe or metal-oxide-semiconductor (in the present embodiment for IGBT manages), boost inductor L, boost capacitor C1 and the first rectifier diode D1 and the second rectifier diode D2.
The second converter input B and the second converter output terminal F are electrically connected.The first converter input A is through boost inductor L, then forward meets the first rectifier diode D1, is electrically connected with the first converter output terminal E.Between the first converter input A and the second converter input B, be electrically connected with boost capacitor C1.The positive pole of the drain electrode of IGBT pipe and the first rectifier diode D1 is electrically connected; The PWM of the grid of IGBT pipe and MPPT control unit drives pin to be electrically connected; The source electrode of IGBT pipe and the second converter input B are electrically connected.The source electrode of IGBT pipe also forward is electrically connected through the drain electrode of the second rectifier diode D2 and this IGBT pipe.
The negative pole of all PV battery components of solar battery array is electrically connected through corresponding fuse 110 and the second converter input B respectively; The positive pole of all PV battery components of solar battery array is also electrically connected with the first converter input A through corresponding fuse 110 respectively.
Between the first converter output terminal E and the second converter output terminal F, be electrically connected with filtering capacitor C2.
The first converter output terminal E and privates input are electrically connected.
The second converter output terminal F and privates input are electrically connected.
The operation principle of DC/DC converter: MPPT control unit 3 drives pin output switch control signal to control the turn-on and turn-off of IGBT pipe by PWM, the work thereby control DC/DC converter 540 boosts.Particularly, when the conducting of IGBT pipe, boost inductor L stored energy; When IGBT pipe turn-offs, due to the electric current retention performance of inductance, boost inductor L is electric discharge slowly, gives boost capacitor C1 charging, and at this moment, the output voltage after this boost capacitor C1 both end voltage is confluxed than all PV battery components is high.
The electrical principle of the header box of the increase DC/DC converter based on above-mentioned, provides the concrete structure of two kinds of header boxs below.
The first embodiment
Hereinafter described " on ", D score all describes with respect to arrow Z direction in Fig. 3 and Fig. 4.
Fig. 3 and Fig. 4 are the header box 600 of the utility model the first embodiment.With reference to Fig. 3, header box 600 comprises housing 601, and preferably, this housing 601 is rectangular-shaped, and this housing 601 is not limited to rectangular-shapedly certainly, can also be polygonal cylinder for bottom surface, or other shapes; Further, these housing 601 inside are formed with airtight accommodation space;
DC/DC converter 540 comprises semiconductor heating device 101 and reactor 104;
On the sidewall of this housing 601, be provided with a plurality of Waterproof locks 112; A plurality of fuses 110, EMC module (comprising an EMC module 1151, the two EMC module 1152 corresponding with an EMC module 1151), MTTP control unit 3, semiconductor heating device 101, public busbar 108, isolating switch 120 and lightning protection device 530 are installed in accommodation space regularly.
Particularly, this accommodation space the first half is provided with semiconductor heating device 101 regularly, and this accommodation space the latter half is installed with MTTP control unit 3; Fuse 110 is arranged in accommodation space the latter half, and is arranged on MTTP control unit 3 belows.EMC module is arranged on accommodation space the latter half, and is arranged between MTTP control unit 3 and fuse 110.This isolating switch 120 is arranged on accommodation space the latter half, and is arranged on MTTP control unit 3 sidepieces.Public busbar 108 is arranged in accommodation space the first half, and is arranged on semiconductor heating device 101 tops.
In the present embodiment, the cable of all PV battery components of solar battery array by with its one to one Waterproof lock 112 stretch in the accommodation space of housing 601; Then, in the cable of all PV battery components of solar battery array, the positive pole of all PV battery components of solar battery array confluxes into one group respectively after corresponding fuse 110, is electrically connected with the input of an EMC module 1151; The negative pole of all PV battery components of solar battery array confluxes into one group respectively after corresponding fuse 110, is electrically connected with the input of the 2nd EMC module 1152;
The first converter input A of the output of the one EMC module 1151 and DC/DC converter 540 is electrically connected; The second converter input B of the output of the 2nd EMC module 1152 and DC/DC converter 540 is electrically connected; Be appreciated that, in order to improve boosting efficiency, header box 600 can comprise many group DC/DC converters 540, particularly, the output of the one EMC module 1151 is electrically connected with the first converter input A of many groups DC/DC converter 540 respectively, and the output of the 2nd EMC module 1152 is electrically connected with the second converter input B of this many group DC/DC converter 540 respectively.In the present embodiment, DC/DC converter 540 is 4 groups, and the output of an EMC module 1151 is electrically connected with the first converter input A of two groups of DC/DC converters 540 respectively; The output of the 2nd EMC module 1152 is electrically connected with the second converter input B of these two groups of DC/DC converters 540 respectively.
Here, identical at the function of confluxing in circuit of header box and power transmission line 520 of public busbar 108.
Particularly, public busbar 108 comprises public positive busbar 1081 and public negative busbar 1082, the first converter output terminal E of DC/DC converter 540 and the input of public positive busbar 1081 are electrically connected, and the second converter output terminal F of DC/DC converter 540 and the input of public negative busbar 1082 are electrically connected.
When header box 600 has many group DC/DC converters 540, the first converter output terminal E of all DC/DC converters 540 is all electrically connected with the input of public positive busbar 1081; The second converter output terminal F of all DC/DC converters 540 is all electrically connected with the input of public negative busbar 1082.
1082 output of the output of public positive busbar 1081 and public negative busbar, respectively through circuit breaker 109, is electrically connected with externally fed circuit.
Header box also comprises radiator 102; This radiator 102 is plugged on housing 601 outer walls, and runs through this housing 601, stretches in the accommodation space of housing 601.Airtight by gluing process between radiator 102 and housing 601.
Particularly, radiator 102 is arranged at housing 601 outer wall the first half, and radiator 102 runs through housing 601 and is connected with semiconductor heating device 101;
In DC/DC converter 540, IGBT pipe or metal-oxide-semiconductor and diode form semiconductor heating device 101, this semiconductor heating device 101 is fixedly mounted in this radiator 102 and stretches in the part of housing 601, and the dissipation of heat this semiconductor heating device 101 being produced by radiator 102 is gone out.
Preferably, this radiator 102 has metal material to make.
Inductor in DC/DC converter 540 and capacitor form reactor 104, and this reactor 104 is arranged on the outer wall of housing 601.Particularly, reactor 104 is arranged in housing 601 outer wall the latter halfs.The stube cable (not shown) that the semiconductor heating device 101 with in housing 601 of reactor 104 is electrically connected stretches in the accommodation space of housing 601 by Waterproof lock 112.
On the outer wall of housing 601, at reactor 104 close positions, be provided with the assembly 113 that keeps off the rain for keeping off the rain to reactor 104.
The second embodiment
Fig. 5 and Fig. 6 show the header box 700 of the utility model the second embodiment.The second embodiment is only that from the difference of the first embodiment bus structure is different.
Particularly, in the present embodiment, header box 700 comprises that n(n is greater than 1 natural number) an individual EMC module 1151 and n the 2nd EMC module 1152; The positive pole of all PV battery components after corresponding fuse 110, confluxes into n group respectively, then is electrically connected with the input of a n EMC module 1151 respectively; Correspondingly, the negative pole of all PV battery components after corresponding fuse 110, confluxes into n group respectively, then is electrically connected with the input of n group the 2nd EMC module 1152 respectively;
A n EMC module 1151 and n the 2nd EMC module 1152 are corresponding one by one respectively;
The first converter input A of the output of each EMC module 1151 and one or more groups DC/DC converter 540 is electrically connected, and the second converter input B of the output of the two EMC module 1152 corresponding with an EMC module 1151 and this one or more groups DC/DC converter 540 is electrically connected;
In the present embodiment, n=2; DC/DC converter 540 is 8 groups.The output of each EMC module 1151 is electrically connected with the first converter input A of two groups of DC/DC converters 540 respectively; The output of the two EMC module 1152 corresponding with an EMC module 1151 is electrically connected with the second converter input B of these two groups of DC/DC converters 540 respectively.
The first converter output terminal E of all DC/DC converters 540 of header box 700 is electrically connected; Similarly, the second converter output terminal F of all DC/DC converters 540 of header box 700 is electrically connected.
By this bus structure of header box 700, the boosting efficiency of confluxing improves greatly; By the positive pole of all PV battery components and negative pole are confluxed into respectively to n group, boost simultaneously, can not be used in boost DC/DC converter 540 because of input voltage excessive and overheated.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection range of the utility model claims.
Claims (10)
1. a header box, for solar photovoltaic generation system, it is characterized in that, described header box (500) comprises housing (601), at least one group of DC/DC converter (540) and the MTTP control unit (3) of working for controlling described DC/DC converter (540); Described DC/DC converter (540) comprises semiconductor heating device (101) and reactor (104);
This housing (601) inside is formed with airtight accommodation space; This accommodation space the first half is provided with described semiconductor heating device (101) regularly, and this accommodation space the latter half is installed with described MTTP control unit (3);
Described housing (601) outer wall the first half is provided with radiator (102), and described radiator (102) runs through described housing (601) and is connected with described semiconductor heating device (101); Described reactor (104) is arranged in described housing (601) outer wall the latter half.
2. header box according to claim 1, is characterized in that, described semiconductor heating device (101) comprises IGBT pipe or metal-oxide-semiconductor.
3. header box according to claim 1, is characterized in that, described MTTP control unit (3) comprises dsp chip.
4. header box according to claim 1, is characterized in that, described DC/DC converter (540) is 4 groups or 8 groups.
5. header box according to claim 1, is characterized in that, described header box also comprises fuse (110), and this fuse (110) is arranged in described accommodation space the latter half, and is arranged on described MTTP control unit (3) below.
6. header box according to claim 1, is characterized in that, described header box also comprises isolating switch (120), and this isolating switch (120) is arranged on described accommodation space the latter half, and is arranged on described MTTP control unit (3) sidepiece.
7. header box according to claim 6, is characterized in that, described isolating switch (120) comprises circuit breaker.
8. header box according to claim 5, is characterized in that, described header box also comprises EMC module, and described EMC module is arranged on described accommodation space the latter half, and is arranged between described MTTP control unit (3) and described fuse (110).
9. header box according to claim 1, is characterized in that, described header box also comprises public busbar (108), and described public busbar (108) is arranged in described accommodation space the first half, and is arranged on described semiconductor heating device (101) top.
10. header box according to claim 1, is characterized in that, on the outer wall of described housing (601), at described reactor (104) close position, is provided with the assembly that keeps off the rain (113) for keeping off the rain to described reactor (104).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320533067.2U CN203434932U (en) | 2013-08-29 | 2013-08-29 | Combiner box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320533067.2U CN203434932U (en) | 2013-08-29 | 2013-08-29 | Combiner box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203434932U true CN203434932U (en) | 2014-02-12 |
Family
ID=50063946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320533067.2U Expired - Fee Related CN203434932U (en) | 2013-08-29 | 2013-08-29 | Combiner box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203434932U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104821735A (en) * | 2015-04-17 | 2015-08-05 | 青岛艾迪森科技有限公司 | Special electric energy optimizing box for photovoltaic power station |
| CN107294487A (en) * | 2017-07-11 | 2017-10-24 | 奥特斯维能源（太仓）有限公司 | A kind of header box |
| CN111801992A (en) * | 2018-03-07 | 2020-10-20 | 法马通有限公司 | Modular plug-in converter unit and control technology power supply system for nuclear power plants |
| CN112367039A (en) * | 2020-11-09 | 2021-02-12 | 华北电力科学研究院有限责任公司 | Intelligent header box |
-
2013
- 2013-08-29 CN CN201320533067.2U patent/CN203434932U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104821735A (en) * | 2015-04-17 | 2015-08-05 | 青岛艾迪森科技有限公司 | Special electric energy optimizing box for photovoltaic power station |
| CN107294487A (en) * | 2017-07-11 | 2017-10-24 | 奥特斯维能源（太仓）有限公司 | A kind of header box |
| CN111801992A (en) * | 2018-03-07 | 2020-10-20 | 法马通有限公司 | Modular plug-in converter unit and control technology power supply system for nuclear power plants |
| CN112367039A (en) * | 2020-11-09 | 2021-02-12 | 华北电力科学研究院有限责任公司 | Intelligent header box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN HOPEWIND ELECTRIC CO., LTD. Free format text: FORMER NAME: SHENZHEN HEWANG ELECTRIC CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 518055 Guangdong city in Shenzhen Province, Nanshan District, Xili Town Dragon Village Second Industrial Zone 5 Patentee after: SHENZHEN HOPEWIND ELECTRIC Co.,Ltd. Address before: 518055 Guangdong city in Shenzhen Province, Nanshan District, Xili Town Dragon Village Second Industrial Zone 5 Patentee before: SHENZHEN HOPEWIND ELECTRIC Co.,Ltd. |
|
| CP02 | Change in the address of a patent holder |
Address after: 518055 Guangdong city of Shenzhen province Nanshan District Xili town village official Liuzhou Industrial Zone No. 5 Building second layer 1-3 Patentee after: SHENZHEN HOPEWIND ELECTRIC Co.,Ltd. Address before: 518055 Guangdong city in Shenzhen Province, Nanshan District, Xili Town Dragon Village Second Industrial Zone 5 Patentee before: SHENZHEN HOPEWIND ELECTRIC Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140212 Termination date: 20210829 |